Arched ramps can provide additional, needed clearance to avoid bottoming out while loading. Remember, weight capacity should well exceed total overall weight, including rider and all attached accessories! Dual runners have a combined weight capacity of 2,400 lbs. Single runner weight capacity is 1,200 lbs. Made in USA with 6063-T5 aluminum billet. Robotically welded. Lightweight with vinyl-coated tips. Includes security straps. Wall thickness is 0.07". 10-year manufacturer's warranty against defects.. Dimensions: 18" x 88". 18" x 88" Set of Two